I am having a very frustrating time on The Gibbering Swarm with 4 players. My group did not have a terribly hard time with Adventures B or 1, a few losses here and there but this particular scenario is super swingy. I have failed the scenario a few times now, but what is worse than failing it is how incredibly tedious the gameplay gets. The issue is the Barriers, pulling Demonic Horde twice in a round with a DC 17 monster that destroys weapons and is immune to spells a portion of the time is just really super un-fun. I suppose if we had more Adventure 2 boons it might not be as tricky but since this is the first adventure and is all monsters and barriers there has not been a chance to get any. And then we pull a Arboreal Blight and find that this summon is also dc 17 in addition to the 2 points of auto damage. Yes the characters can beat a 17 somewhat reliably at this point, but only by spending significant resources. If they just pulled a different barrier on the previous turn, or if the random selection hits the same player hard well then some players just lost their whole hand before their turn. And if any of the four gets unlucky? You get to do it all again!
So I can see how we will beat this scenario - dumb luck of not drawing too many summoning barriers when the locations are built. All I have to do is keep trying again and again and not dieing along the way. I know random chance is a big part of these games so this is kind of always the case but here in particular it seems like progress is blocked entirely by luck. The prospect is depressing and un-fun. I'd be much better off just skipping the scenario, but then I might as well just put the box away and forget about the whole thing.